Knotter or strainer for paper manufacture.



R. WANDEL. KNOTTER 0R STRAINER FOR PAPER MANUFACTURE. APPLICATION TILED JAN. 2. 1914.

1 ,105 ,227, Patented July 28, 1914.

2 SHEETSSHBET 1.

THE NORRIS PETERS CO.. PHDTOLJTHO-, WASHINGTON D. CT

. R.;WANDEL. KNOTTER 0R STRAINBKFOB. PAPER MANUFACTURE. APPLICATION FILED 1L2, 1814.

1 105 227 Patented July 28,1914.

2 SHEETS-SHEET 2.

'rms ivonm PETERS (0.. PHo'raurl-m. wAsr lmcrbuTn. cv

ends so as to impart a jerking or shaking ally been almost impossible to enable the of the drum to be varied according to the- ROBERT WANDEL, OF REUTLINGEN, GERMANY.

KNOTTER on s'rnanvnn FOR PAPER MANUFACTURE.

Specification of Letters'iatent. Pateni d J uly 28 1914} Application filed January 2, 1914. Serial No. 810,061.

To all whom it may concern:

Be it known that 1, ROBERT VVANDEL, subject of the King of lVurt-temberg, residing at Reutlingen, Germany, have invented certain new and useful Improvements in Knotters or Strainers for Paper Manufacture, of which the following is a specification.

This invention relates to rotatable knotters or strainers employed in the manufacture of paper, card board. cellulose or the like of the type in which the sieve or sorting drum is carried by swinging levers capable of beingreciprocated vertically at their free motion to the drum. Hitherto it has been usual to reciprocate the free ends of the levers by means of cams or ratchet wheels acting on the free ends of the levers but this arrangement is too noisy in operation. It has therefore been sought to insure quieter running of the machine by positively connectingthe free ends of the levers to rotatable eccentrics, but this arrangement has the drawback that the oscillatory motion imparted to the levers is too subdued, not being energetic enough to effect ElllClGIlt stra1nage of the material. Moreover. it has usuthrow of the eccentric to be varied.

One object of the present invention is to provide for efiicient' shaking of the drum while enabling the shaking motion to be varied according to requirements, at the same time providing for quiet running of the machine.

A further object of the present invention is to provide an adjustable bearing for the drum so as to enable the stepwise rotation material under treatment as it has been found that excessive wear of the bearings takes place, unless the latter are made adjustable. Moreover, with non-adjustable bearings the stepwise rotation of the drum could not be regulated to suit the different materials and if rotated too rapidly too much material was thrown oft" into the knot collecting trough, whereas if rotated too slowly the straining or sorting action was defective as the perforated drum rapidly became choked, thus resulting in unequal weight in the finished paper or tearing of the wet paper strip.

According to the present invention the foregoing disadvantages are obviated by connecting the free end of'the levers carrying the drum to the'eccentrics in such a manner that the latter are capable of freely reciprocating vertically when the levers are at a corresponding height; while jerkily but 'noiselesslyraising the levers and thus eifecting energet1c shaking of the drum. The free downward movement of the levers is limited in the usual manner by an adjustable strap. Moreover, the leather or like bearingsurfaces supporting the drum are capable of adjustment by means of adjustable segments or by means of an adiustable steel or other'fiexible band beneath the leather bearing surface.

In order that the invent-ion may be more clearly understood referenceis made to the accompanying drawings showing two embodiments of the invention by way of example. i

Figure 1 isan end view of the knotter or strainer andFig. 2 a detail end view drawn to an enlarged scale. Fig. 3 is an end view of the knotter or strainer'having adjustable bearing surfaces andFig. L is a fragmentary plan thereof.

The sorting drum brestswithin a trough a upon swinging levers c which are rotatably mounted at one end upon pivot pins (Z,

the other end 6 of the lever being free to move upwardly and downwardlv. The free end e of the levers is surrounded by a strap 72, having a screwed stem o adiustable by means of an internally screwed hand wheel or nut f upon the farm or. support 79, a rubber cushion Q or the like being preferably interposed between the support 79 and Mounted upon a rotatable shaft 2' beneath each swinging lever 0 is an eccentric 7c. the strap Z of which is connected to a slotted bar or rod m fitting beneath the end 6 of the .lever c. A transverse pin r on the lever 0 fits in a slot .9 in the eccentric rod on thus insuring the relative position of the parts 6 and m.

In Figs. 1 and 2. ofthe drawings the lever c is shown resting in the strap h. while the eccentric. is in its lowermost dead point position. On the rotation of the eccentric 7c the rod 77?. strikes the end 6 of the lever 0 and swings the latter upwardly. The drum 5 moves therewith and since the lever swings about the pivot pins d the drum will be raised at the righthand side a greater amount than at the lefthand side and thus also rotates about the pivot pins (5, particularly when the bearing surfaces between the lever c and the journals a of the drum 6 are constructed of leather or the like.

When the eccentric is has reached its uppermost dead point the downward movement of the lever c commences and may, if desired, be accelerated by means of a spring in the usual manner. The drum Z), however, does not move down simultaneously with the lever 0, but will continue its upward movement for a short time owing to its momentum. The friction at the bearing surfaces will thus be diminished and the drum 6 will continue to rotate until it again rests upon the bearing surfaces of the levers c. It has been found that the shaft 6 can be driven at a speed of 300 to 600 revolutions per minute. In this manner the drum Z) is set in stepwise rotation about its axis;

In order to make the friction at the bearings independent of the wear and enable the angular velocity of the drum to be varied according to the material under treatment, the leather or like bearingsurfaces on the levers 0 are capable of adjustment and as shown in Figs. 3 and 4 may be adjusted by means of studs 41. The bearings may, for example, consist of segments inserted between the bearing surface of the lever 0 and the leather lining, these segments being capable of adjustment toward the journals n of the drum by means of the studs 4;. If desired, however, a steel or like elastic band may be provlded beneath the leather lining, this band being adjustable by means of set screws or studs. The flexible band or the adjustable segments will be preferably fitted in grooves in the bearing.

I claim:

1. The improved knotter or strainer comprising a sorting drum, swinging levers supporting said drum, a member supporting the free end of each of said levers, an eccentric and a member connected to said, eccentric Copies of this patent may be obtained for and adapted to raise the free end of each of said levers but to fall independently thereof.

2. The improved knotter or strainer comprising a sorting drum, swinging levers supporting said drum, a member supporting the free end of each of said levers, an eccentric and a forked member actuated by said eccentric and embracing the free end of each of said levers.

3. The improved knotter or strainer comprising a sorting drum, swinging levers supporting said drum, adjustable straps supporting the free ends of said levers, a shaft, eccentrics on said shaft, forked members slotted at right angles to the fork thereof, straps around said eccentrics, and connected to said forked members, and transverse pins in the free ends ofsaid levers engaging the slots in said forked members.

4. In a knotter or strainer for paper and like pulp, a sorting drum, swinging levers supporting and adapted to reciprocate said drum, bearings on said levers for said drum, friction linings between said bearings and drum, and means for adjusting said linings toward the drum.

5. In a knotter or strainer for paper and like pulp, a sorting drum, swinging levers supporting and adapted to reciprocate said drum, bearings on said levers for said drum, friction linings between said bearings and drum, and adjustable segments between said bearings and linings.

6. Ina knotter or strainer for paper and like pulp, a sorting drum, swinging levers supporting and adapted to reciprocate said drum, bearings on said levers for said drum, friction linings between said bearings and drum, and adjustable flexible bands between said bearings and linings.

In testimony whereof I affix my signature in presence of two witnesses.

ROBERT WANDEL WVitnesses:

PRIDE KLAIBER, PAULINE MI'J'LLER.

five cents each, by addressing the Commissioner of Eatents, Washington, D. 0. 

